An Ivy League professor has suggested naming Republican presidential candidate Ben Carson “coon of the year” for saying it should be legal for private citizens to display the Confederate flag.

Anthea Butler is a religious studies professor at the University of Pennsylvania, and also an active Twitter user with more than 62,000 tweets. Last week, another user tweeted a link to a Sports Illustrated article describing Carson’s declaration that NASCAR fans should be allowed to show the Confederate flag.

“If only there was a ‘coon of the year’ award…” Butler tweeted in response. The tweet was spotted by the website Campus Reform, which grabbed a quick screenshot. The website contacted Butler for comment, which led the tweet being quickly deleted:

UPenn religion department chair Justin McDaniel told The Washington Examiner that Butler is on sabbatical and that the department has no comment on the matter, while a Carson campaign spokesperson said the tweet “does not merit a response.”